<x-container>
  <x-header>Header</x-header>
  <x-main>Main</x-main>
</x-container>
<x-container>
  <x-header>Header</x-header>
  <x-main>Main</x-main>
  <x-footer>Footer</x-footer>
</x-container>
<x-container>
  <x-aside>Aside</x-aside>
  <x-main>Main</x-main>
</x-container>
<x-container>
  <x-header>Header</x-header>
  <x-container>
    <x-aside>Aside</x-aside>
    <x-main>Main</x-main>
  </x-container>
</x-container>
<x-container>
  <x-header>Header</x-header>
  <x-container>
    <x-aside>Aside</x-aside>
    <x-container>
      <x-main>Main</x-main>
      <x-header>footer</x-header>
    </x-container>
  </x-container>
</x-container>
<x-container>
  <x-aside>Aside</x-aside>
  <x-container>
    <x-header>Header</x-header>
    <x-main>Main</x-main>
  </x-container>
</x-container>
<x-container>
  <x-aside>Aside</x-aside>
  <x-container>
    <x-header>Header</x-header>
    <x-main>Main</x-main>
    <x-header>footer</x-header>
  </x-container>
</x-container>
